attempted fix for issue with latest pytest-asyncio [WIP]

pytest_operator/plugin.py

@@ -153,6 +153,19 @@ def pytest_runtest_setup(item):
         pytest.skip("Skipping deployment because --no-deploy was specified.")
 
 
+@pytest.fixture(scope="session")
+def tmp_path_factory(request):
+    # Override temp path factory to create temp dirs under Tox env so that
+    # confined snaps (e.g., charmcraft) can access them.
+    return pytest.TempPathFactory(
+        given_basetemp=Path(os.environ["TOX_ENV_DIR"]) / "tmp" / "pytest",
+        trace=request.config.trace.get("tmpdir"),
+        _ispytest=True,
+        retention_count=1,
+        retention_policy="failed"
+    )
+
+
 def check_deps(*deps):
     missing = []
     for dep in deps:
@@ -168,25 +181,13 @@ def check_deps(*deps):
         )
 
 
-@pytest.fixture(scope="module")
-def event_loop():
-    """Create an instance of the default event loop for each test module."""
-    loop = asyncio.get_event_loop_policy().new_event_loop()
-    yield loop
-    loop.close()
-
-
-# Plugin load order can't be set, replace asyncio directly
-pytest_asyncio.plugin.event_loop = event_loop
-
-
 def pytest_collection_modifyitems(session, config, items):
     """Automatically apply the "asyncio" marker to any async test items."""
     for item in items:
         is_async = inspect.iscoroutinefunction(getattr(item, "function", None))
         has_marker = item.get_closest_marker("asyncio")
         if is_async and not has_marker:
-            item.add_marker("asyncio")
+            item.add_marker(pytest.mark.asyncio(scope="module"))
 
 
 @pytest.hookimpl(tryfirst=True, hookwrapper=True)

tests/unit/conftest.py

@@ -0,0 +1,8 @@
+import pytest
+
+pytest_plugins = ["pytester"]
+
+@pytest.fixture(autouse=True)
+@pytest.mark.asyncio_event_loop
+def setup_asyncio_loop():
+    pass